[MetalMan]

I haven't stripped a diff with the aluminum tranny case. At one point I did bend the aluminum motor plate, and so tried out the stock diff case (a new one, but not the new gray plastic). The diff instantly shredded. I looked at my aluminum idler gear, and noticed that the teeth were sharp from wear against the steel top gear. After getting a new aluminum idler and diff gear, I still managed to almost instantly strip the diff gear.

FLM did their homework on the tranny case. I recall Mike telling me that "I would be back" for the steel diff, but I can say that thus far I'm keeping my $70 :p.

Lately I've been running a Mamba Max 4600 system on 4s Lipo, which is quite a bit of power for the diff to be able to handle.

Besides the diff gear, I'm also stripping spur gears a lot less. The only time the spur gear strips is when the set screw on the pinion gear loosens and then the set screw itself makes contact with the spur and eats into it.